|Publication number||US7535423 B2|
|Application number||US 11/552,943|
|Publication date||May 19, 2009|
|Filing date||Oct 25, 2006|
|Priority date||Oct 25, 2006|
|Also published as||US20080100515|
|Publication number||11552943, 552943, US 7535423 B2, US 7535423B2, US-B2-7535423, US7535423 B2, US7535423B2|
|Inventors||Ching-Chi Lin, Kai Shih, Yu-Yuan Wu|
|Original Assignee||Cheng Uei Precision Industry Co., Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (3), Classifications (10), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
This present invention relates generally to an antenna for transmitting and receiving radio frequency signals, and more particularly to a multiple-band monopole coupling antenna operating over a wide bandwidth of frequencies or over multiple frequency bands.
2. The Related Art
It is generally known that antenna performance is dependent upon the size, shape and material composition of the constituent antenna elements, as well as the relationship between certain antenna physical parameters and the wavelength of the signal received or transmitted by the antenna.
As the mobile phone is popular, the mobile phone is required to be small and light. Thus, the antenna as a part of the mobile phone is needed to small area and receiving/transmitting all the frequency bands of the mobile communication. Because different countries in the world are using different mobile communication system, such as the GSM, PHS, DCS Wi-Fi or PCS communication system, different antenna are required to fit into the mobile phones.
A traditional antenna which is fit in a mobile phone can be used in one or two communication systems, so the mobile phone cannot used in every country in the world. The mobile phone cannot be small and light, as a reason the traditional antenna located the mobile phone has a large area.
An object of the invention is to provide a multiple-band monopole antenna includes a dielectric board, a low frequency antenna and a high frequency antenna. The low frequency antenna and the high frequency antenna are located on the dielectric board, and the high frequency antenna is adjacent to the low frequency antenna. The length of the low frequency wire equals to the half wavelength of the low frequency waves which are used in mobile communication, so the low frequency antenna can receive and transmit GSM850, GSM and Wi-Fi. The length of the high frequency antenna equals to the high frequency waves which are used in mobile communication. While the low frequency antenna is receiving or transmitting signal, the high frequency antenna coupling with the low frequency antenna, so the high frequency antenna can receive and transmit DCS, PCS and WCDMA-2100. So the multiple-band monopole antenna can receive and transmit all frequency waves, which are used in the mobile communication.
The invention, together with its objects and the advantages thereof may be best understood by reference to the following description taken in conjunction with the accompanying drawings, in which:
First referring to
The low frequency antenna 20 is a monopole antenna. The length of the low frequency antenna 20 equals to the half length of the low frequency wave, which is used in the mobile communication.
Please refer to
The high frequency antenna 30 is a monopole antenna. The length of the high frequency antenna 30 equals to the quarter length of the high frequency waves, which are used in the mobile communication.
While the multiple-band monopole antenna 100 is working, the low frequency antenna 20 can receive and transmit two low frequency waves (GSM850 and GSM), and the low frequency antenna 20 can receive and transmit a high frequency wave (Wi-Fi) by resonancing. The widthbands of the two low frequency waves were changed by changing the length of the straight wire 21. While the fourth fold wire 25 is short, the low frequency antenna 20 trends to receive and transmit the high frequency portion of the two low frequency waves (GSM850 and GSM). While the fourth fold wire 25 is long, the low frequency antenna 20 trends to receive and transmit the low frequency portion of the two low frequency waves (GSM850 and GSM). The high frequency antenna 30 is adjacent to the low frequency antenna 20, so the high frequency antenna 30 coupling with the low frequency antenna 20, the high frequency antenna 30 can receive and transmit three high frequency waves (DCS, PCS and WCDMA-2100). While the straight wire 22 of the low frequency antenna 20 is adjacent to the unbent wire 32 of the high frequency antenna 30, the high frequency antenna 30 trends to receive and transmit the high frequency portion of the high frequency waves (DCS, PCS and WCDMA-2100). While the straight wire 22 of the low frequency antenna 20 keep away from the unbent wire 32 of the high frequency antenna 30, the high frequency antenna 30 trends to receive and transmit the low frequency portion of the three high frequency waves (DCS, PCS and WCDMA-2100).
An embodiment of the present invention has been discussed in detail. However, this embodiment is merely a specific example for clarifying the technical contents of the present invention and the present invention is not to be construed in a restricted sense as limited to this specific example. Thus, the spirit and scope of the present invention are limited only by the appended claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
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|US20070210969 *||Aug 3, 2006||Sep 13, 2007||Scott La Dell Vance||Multi-frequency band antenna device for radio communication terminal|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8933848||Jun 29, 2012||Jan 13, 2015||Cardiac Pacemakers, Inc.||Multi-band multi-polarization stub-tuned antenna|
|US8947301||Jun 29, 2012||Feb 3, 2015||Cardiac Pacemakers, Inc.||Multi-band loaded antenna|
|US9425516||Jul 8, 2013||Aug 23, 2016||The Ohio State University||Compact dual band GNSS antenna design|
|U.S. Classification||343/702, 343/729, 343/700.0MS|
|Cooperative Classification||H01Q21/30, H01Q1/38, H01Q9/42|
|European Classification||H01Q9/42, H01Q21/30, H01Q1/38|
|Oct 26, 2006||AS||Assignment|
Owner name: CHENG UEI PRECISION INDUSTRY CO., LTD., TAIWAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIN, CHING-CHI;SHIH, KAI;WU, YU-YUAN;REEL/FRAME:018440/0773
Effective date: 20061025
|Oct 15, 2012||FPAY||Fee payment|
Year of fee payment: 4
|Dec 30, 2016||REMI||Maintenance fee reminder mailed|